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Moon+ Reader vs KOReader: catalog facts
Moon+ Reader	KOReader
Freemium Free version available, with a paid Pro version.	Free Free and open source under the AGPL 3.0.
Android	Linux, Android
Very wide format support including Markdown and CHM Reads books inside ZIP and RAR archives and OPDS catalogs	Runs on Kindle, Kobo, PocketBook, Cervantes and reMarkable hardware Opens PDF, DjVu, CBZ, EPUB, FB2, Mobi, DOC, RTF, HTML, CHM and TXT
Android only Some features require the paid Pro version	Installing on a locked e-reader means jailbreaking it first, at your own risk The settings menus are deep and not self-explanatory
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: AGPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.